Microstructures and superconducting properties in Ti-doped MgB2/Ta/Cu tape

Superconducting properties of SiC-buffered-MgB2tapes

“…They stated that with SiC doping, the H irr and J c (H) of MgB 2 were significantly improved because of the improvement of flux pinning. At 20 K, H c2 and H irr values of SiC buffered-MgB 2 shown here are ~ 6.5 and 5 T, respectively; little lower than those found in YSZ-buffered MgB 2 /Hastelloy tape [8], but are comparable and even slightly higher than those found in the Ti-doped MgB 2 /Ta/Cu tape [17].…”

Co-addition into MgB2: The structural and electronic properties of (MgB2)2−xCox

“…However, T c of MgB 2 has not been enhanced in any substitutions/doping case. Nano SiC [13], Ti addition [14][15][16], C [17], ZrSi 2 and WSi 2 additions [18], Zn and Al double [19], Zr and Hf additions [20], Ir substitution [21], Pb substitution [22], Li and Na additions [23,24], Ag addition [25], Sn, Co and Fe addition [26], Ti, Zr, Mo, Mn, Fe, Ca, Al, Ag, Cu, Y, Ho additions [27,28] and Cr addition [29] were found to have a crucial role on the flux-pinning, critical current density and also irreversibility field of MgB 2 material. However, most of the substitutions/dopings have led to small or large decrease on T c or completely depression of superconductivity.…”

Chemical interactions in Ti doped MgB2superconducting bulk samples and wires

“…Nanoscale ceramic additions improve superconducting properties in the conventional manner, by introducing normal regions with sizes on the scale of the coherence length, which then act as flux pinning sites. A significant number of papers have also reported a beneficial effect of metal additions [16][17][18][19][20][21][22][23][24][25]. Zhao et al have observed a 1 nm TiB 2 layer at grain boundaries in in situ synthesized MgB 2 bulk material with titanium additions [18].…”